25717471 has 4 divisors (see below), whose sum is σ = 27695752. Its totient is φ = 23739192.

The previous prime is 25717463. The next prime is 25717477. The reversal of 25717471 is 17471752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25717471 - 2³ = 25717463 is a prime.

It is a super-3 number, since 3×25717471³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25717477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989121 + ... + 989146.

It is an arithmetic number, because the mean of its divisors is an integer number (6923938).

Almost surely, 2^25717471 is an apocalyptic number.

25717471 is a deficient number, since it is larger than the sum of its proper divisors (1978281).

25717471 is a wasteful number, since it uses less digits than its factorization.

25717471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978280.

The product of its digits is 13720, while the sum is 34.

The square root of 25717471 is about 5071.2395920524. The cubic root of 25717471 is about 295.1726309320.

The spelling of 25717471 in words is "twenty-five million, seven hundred seventeen thousand, four hundred seventy-one".